I have been an avid runner for about 5 years. Recently I have been getting an awful cramp on the right side of my body and at varying times during the run. I have participated in races from a full marathon to a 5k. I have done speed training as well as distance training. It is not an eating cramp. I have also tried to drink a lot of sports drinks to replenish my electrolytes. Nothing is helping. I am at a loss.